Grain-kiddle



A. ROWE. Grain Riddle.

Patented Dec.- 4 1860.

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UNITED STATES PATENT @FFIQE.

ANSON ROWE, or ATALISSA, Iowa.

GRAIN-RIDDLE.

Specification of Letters Patent No. 30,840, dated December 4, 1860.

To all whom it may concern:

Be it known that I, ANsoN ROWE, of Atalissa, in the county of Muscatineand in the State of Iowa, have invented a new and Improved Mode ofConstructing Riddles, or Sieves; and I do hereby declare that thefollowing is a full and exact description thereof, reference being hadto the accompanying drawings, and to letters of reference markedthereon, making a part of the specification, in which Figure 1 is aperspective view of my improvement, and Figs. 2 and 3 are sectionalelevations.

Similar letters of reference indicate the same parts in both figures.

To enable others skilled in the art to make and use my invention, I willproceed to describe its construction and operation.

I construct the frame of the riddle A A A A in any of the known formsfor such articles. I then cross said frame on the inside with partitionsor rests B, wooden or metallic,- in a direction parallel with the sidesA A of the riddle when in use, or parallel with direction the grainwould take in passing over the riddle. The arrow indicates the course ofthe grain. The rests B are arranged at a greater or less interval andare made of a width and thickness suited to the purpose of their use,the upper surface of all of the rests being brought up to a level withupper side of the frame. I then cross the supports or rests B with wiresat right angles to the rests, the wires being placed at a distance apartsuited to the use intended, sinking the wires into said supports orrests, which are notched out for that purpose at the intersections ofthe wires. The wires are sunk far enough into the rests so as to belevel with their upper edges. I then secure or fasten the ends in anyknown manner, the wires being also sunk into the frame pieces A A. Inext leave a portion of the rests B unoccupied by wire and in theirplace put a piece of thin metal or thin board D as shown, so as to allowthe air from a fan to have direct and immediate action upon the grainand at a proper angle. The grain first passes over the board D and isthen delivered uponv the riddle.

The riddle thus constructed presents an entirely smooth surface upon itsupper side, the wires being sunk into the edges of the rests B and intothe side pieces, and the receiving board D being also sunk into theframe so that its surface will be on a level with the edges of the restsand frame.

This riddle is intended for use in place of the common sieves or riddlesemployed in the ordinary winnowing machines. No description of suchmachines is here necessary because they form no part of my invention.

Among the advantages which result from the use of my improved riddle arethese: The surface of the riddle being entirely level and smooth, noobstruction is presented to the free descent of the grain, but it flowsdown in an evenly spread sheet, and is thus uniformly acted upon by theblast of air from the fan, which is applied below the riddle in theusual manner. In the ordinary riddles, owing to the unevenness of thewire surface, the grain is continually checked in its descent, in someplaces more than others, and thus it collects more thickly at one partof the surface of the riddle than at others. At those points where thegrain is thus collected it is of course impossible for the air topenetrate and the separation is consequently defective.

Another advantage of the even surface is that the broken seeds, chaffand light substances contained in thegrain are caused to slide freelyoff from the riddle; but in the common riddles these substances are aptto catch upon the elevations of the meshes and lodge upon or fill up theapertures thereof.

Another advantage of my improvement arises from having the restsarranged at right angles to the sunken wires, and also by having asuflicient number of these rests to divide up the area of the under partof the riddle into frequent longitudinal channels. The rests serve tostiffen the whole riddle, and render the screening surface when thewires are sunk therein, perfectly level.

The channels serve to direct the air in separate streams against thegrain as it descends, so that each portion of grain that covers thespace betweentwo rests, receives an independent current of air.

The upper surface of the thin receiving board D serves to conduct thegrain evenly to the open spaces of the riddle, and the under surface ofsaid board serves to conduct the air close upv to the under surface ofthe riddle and cause it to pass or divide evenly between the severalrests.

Having thus described my invention, what I claim as new and desire tosecure by Let Wise made as herein shown and described terIs hPatent, isf h dd1 01 for the purposes set forth.

6 constructlon 0 t e r1 e W1 1 a receiving board D and rests B arranged10n- ANSON ROWE 5 gitudinally with the course of the grain, andWVitnesses:

the Wires sunk into the edges of said rests E. HALL COVEL, and into theface of the frame, and other- H. B. DICKINSON.

